<template>
  <el-container class="home-container">
    <!-- 头部 -->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出账号</el-button>
    </el-header>
    <!-- 主体 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse?'64px':'200px'">
          <div class="toggle-button" @click="toggleCollapse">|||</div>
          <!-- 侧边栏菜单区域 -->
        <el-menu default-active="2" background-color="#333744" text-color="#fff" active-text-color="#ffd04b" unique-opened
        :collapse="isCollapse" :collapse-transition="false" :router="true" :default-active="activePath">
            <!-- 一级菜单 -->
          <el-submenu :index="item.id+''" v-for="item in menuList" :key="item.id">
            <template slot="title">
                <!-- 图标 -->
              <i :class="iconsObj[item.id]"></i>
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children"
            :key="subItem.id" @click="saveNavState('/'+subItem.path)">
                <i class="el-icon-menu"></i>
                <span>{{subItem.authName}}</span>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main><router-view></router-view></el-main>
    </el-container>
  </el-container>

</template>

<script>
export default {
  data () {
    return {
      // 左侧菜单的数据
      menuList: [],
      iconsObj: {
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      window.sessionStorage.clear()
      this.$router.push('./login')
    },
    // 获取所有菜单
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      else this.menuList = res.data
    },
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}

</script>

<style lang="less" scoped>
  .home-container {
    height: 100%;
  }

  .el-header {
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0px;
    align-items: center;
    color: #fff;
    font-size: 20px;

    div {
      display: flex;
      align-items: center;

      span {
        margin-left: 15px;
      }
    }
  }

  .el-aside {
    background-color: #333744;
    .el-menu {
        border-right: none;
    }
  }

  .el-main {
    background-color: #EAEDF1;
  }
  .iconfont {
      margin-right: 10px;
  }
  .toggle-button {
      background-color: #4a5064;
      font-size: 10px;
      text-align: center;
      color: #fff;
      line-height: 20px;
      letter-spacing: 0.2em;
      cursor: pointer;
  }

</style>
